JP6340806B2 - Power storage device and regulating member arranged in power storage device - Google Patents

Description

  The present invention relates to a power storage device including a plurality of power storage elements.

  As an approach to global environmental problems, vehicles equipped with a motor as a power source, such as hybrid vehicles and electric vehicles, instead of conventional gasoline vehicles are beginning to spread.

  In addition, power storage devices including a plurality of power storage elements such as lithium ion secondary batteries are widely used as a power source for supplying power to motors provided in these hybrid vehicles and the like.

  Each of the power storage elements provided in such a power storage device includes, for example, an electrode terminal provided so as to protrude from the container, and a metal connection plate connected to the electrode terminal.

  In addition, a conductive member such as a bus bar is fastened to each of the connection plates of the adjacent power storage elements by, for example, bolts and nuts, and these power storage elements are electrically connected by the conductive member.

  Patent Document 1 discloses a structure for preventing movement of electrode terminals and the like when fastening a connection plate and a conductive member in a battery having such a configuration.

Japanese Patent No. 5146110

  Here, in a power storage element such as a battery, when an external conductive member is attached with a bolt and a nut or the like, in order not to move a member such as an electrode terminal, conventionally, as disclosed in Patent Document 1 above, An insulating member (fixing member) for fixing these members is incorporated in the electric storage element.

  Specifically, this fixing member is disposed on the lid plate together with other members such as electrode terminals, and the lid plate and the container body are joined so that the opening of the container body is closed by the lid plate.

  As a method for joining the lid plate and the container body, for example, welding is used. Conventionally, the presence of the fixing member can be a limitation on the position and range of welding.

  Further, since it is necessary to complete the attachment of the fixing member to the lid plate before welding the lid plate and the container main body, the presence of the fixing member is a power storage element and a power storage device including a plurality of power storage elements. It can also be a limitation on the manufacturing process of the device.

  In consideration of the above-described conventional problems, the present invention is a power storage device including a plurality of power storage elements, and each power storage element can be efficiently manufactured with the occurrence of unnecessary displacement of members such as electrode terminals being suppressed. It is an object of the present invention to provide a power storage device that can be used.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention is a power storage device including a plurality of power storage elements, each of the plurality of power storage elements including a container that houses an electrode body, and the electrode A first terminal that is an electrode terminal that is electrically connected to the body and protrudes from the container; a first connection plate connected to the first terminal; the first connection plate; A first fastening member that fastens the conductive member, and at least a part of the power storage device is disposed between the container and the first connection plate of each of the plurality of power storage elements, A regulating member that regulates movement of the first fastening member in a direction that intersects the protruding direction of the first terminal.

  According to this configuration, in each power storage element, a part of the first fastening member that fastens the first connection plate and the external conductive member is moved in the direction intersecting the protruding direction of the first terminal by the restriction member. Is regulated.

  Accordingly, when the first connection plate and the conductive member are fastened, for example, the first connection plate is prevented from rotating around the first terminal. As a result, it is possible to suppress a decrease in the reliability of connection between the first connection plate and the first terminal, or a decrease in airtightness between the first terminal and the container.

  In addition, since the regulating member is arranged between the containers of the plurality of power storage elements and the first connection plate, the regulating member is arranged in a container in which the lid plate and the container body are joined by welding or the like, for example. can do. That is, simply speaking, the restricting member can be disposed later on the container of the electricity storage element.

  Therefore, for example, after arranging a plurality of completed products of the power storage elements in the exterior body (case), the regulating member can be easily placed on the plurality of power storage elements. Thereby, the manufacturing efficiency of the power storage device is improved.

  As described above, the power storage device according to this aspect is a power storage device in which occurrence of unnecessary displacement of members such as electrode terminals in each of the plurality of power storage elements is suppressed and can be efficiently manufactured.

  Further, in the power storage device according to one aspect of the present invention, the restriction member is an engagement portion including a portion provided in a cutout shape from an end edge of the restriction member, and among the plurality of power storage elements It is good also as having an engaging part engaged with parts other than the wall surface of the said container of at least 1 electrical storage element.

  According to this configuration, the restricting member has the engaging portion that engages with the predetermined portion by inserting the predetermined portion of the at least one power storage element from the end edge.

  Thereby, the stability of the attitude | position of a control member can further be improved, without inhibiting the characteristic of the control member which can be retrofitted to an electrical storage element. As a result, the anti-rotation effect for the first connection plate and the first terminal in each power storage element is also improved.

  Moreover, the electrical storage apparatus which concerns on 1 aspect of this invention WHEREIN: The said engaging part may engage with said 1st terminal which is parts other than the wall surface of the said container of the said at least 1 electrical storage element.

  According to this configuration, the restriction member can be retrofitted and fixed to the plurality of power storage elements using the first terminal of at least one power storage element.

  Further, in the power storage device according to one aspect of the present invention, the restriction member further contacts the wall surface of the container of at least one power storage element of the plurality of power storage elements. It is good also as having a contact part which controls rotation in the plane which intersects the projection direction of one terminal.

  According to this configuration, the movement or rotation of the regulating member with respect to the plurality of power storage elements is more reliably suppressed, and as a result, the anti-rotation effect on the first connection plate and the first terminal in each power storage element is also improved.

  Further, in the power storage device according to one embodiment of the present invention, the contact portion is parallel to a direction intersecting with a main surface of the container of the at least one power storage element on which the first terminal is disposed. It may be possible to regulate the rotation of the regulating member in the plane by coming into contact with the side wall surface which is a wall surface from the outside.

  Further, in the power storage device according to one aspect of the present invention, the contact portion is erected from an edge of a main surface that is a surface on which the first terminal of the container of the at least one power storage element is disposed. The rotation of the restriction member in the plane may be restricted by abutting on the inner wall surface, which is a wall surface, from the inside.

  Thus, the contact portion can be provided on the regulating member in a manner corresponding to the shape of the container of the power storage element, for example.

In the power storage device according to one embodiment of the present invention, each of the plurality of power storage elements is further connected to the second terminal, which is an electrode terminal having a polarity opposite to the first terminal, and the second terminal. A second connecting plate; and a second fastening member that fastens the second connecting plate and a conductive member outside the power storage element, wherein the restricting member is partially a container of each of the plurality of power storage elements. And the second connection plate, and the movement of the plurality of second fastening members in the direction intersecting the protruding direction of the second terminal may be restricted .

  According to this configuration, for example, the rotation prevention on the first terminal side and the second terminal side in each power storage element can be carried by one member (regulation member). Therefore, it is possible to reduce the number of parts constituting the power storage device, simplify the manufacturing process of the power storage device, and the like.

  In the power storage device according to one aspect of the present invention, the restriction member may have a thin portion that facilitates bending of the restriction member at a position between the first terminal and the second terminal. .

  According to this configuration, since the work of attaching the regulating member to the plurality of power storage elements is facilitated, the production of the power storage device is further improved.

  Moreover, the electrical storage apparatus which concerns on 1 aspect of this invention WHEREIN: The said limitation member is good also as having insulation which electrically insulates the said 1st fastening member and said container of each of these electrical storage elements.

  According to this configuration, since the regulating member is partially disposed between the conductive member (for example, bus bar) and the container of each power storage element, electrical insulation between the conductive member and each container is ensured. . Therefore, even if the power storage device is placed in an abnormal state where the conductive member or the power storage element is deformed by a strong impact, a short circuit between the container of the power storage element and the conductive member is not possible. Occurrence is suppressed.

  In the power storage device according to one embodiment of the present invention, the restriction member may be made of a composite material of a resin and an inorganic material.

  According to this configuration, for example, it is possible to improve the strength as a detent of a member such as the first terminal in each power storage element and to improve the reliability of electrical insulation between the container and the other member.

  In the power storage device according to one aspect of the present invention, the first fastening member may include a bolt and a nut, and the regulating member may hold the nut that is a part of the first fastening member. .

  According to this configuration, the restriction member in a state in which the number of nuts corresponding to the number of the electricity storage elements is held is arranged so as to be inserted between the first connection plate of each electricity storage element and the container, whereby the restriction member Can be retrofitted to a plurality of power storage elements.

  In the power storage device according to one aspect of the present invention, the first fastening member includes a bolt and a nut, and the regulating member holds the bolt that is a part of the first fastening member in an upright state. And the groove | channel extended from the edge of said 1st connection board to the position which the said volt | bolt penetrates may be formed in said 1st connection board.

  According to this configuration, the regulating member that holds the bolts in an upright state according to the number of power storage elements is inserted into the grooves provided in the first connection plate of each power storage element. By disposing, the regulating member can be retrofitted to the plurality of power storage elements.

  Further, in the power storage device according to one embodiment of the present invention, the restriction member is located at a position between two adjacent power storage elements when the plurality of power storage elements are viewed from a side where the conductive member is disposed. A groove provided in a cutout shape from an edge of the regulating member or a hole penetrating the regulating member in the thickness direction may be formed.

  According to this configuration, in the regulating member disposed so as to cover a part of the container of each of the plurality of power storage elements, a groove is formed in a portion between the power storage elements that has less influence on functions such as rotation prevention and insulation of the member. Or a hole is provided. Thereby, for example, heat generated in each power storage element can be efficiently radiated. In addition, the material used for the regulating member can be reduced and the weight of the regulating member can be reduced as long as the strength required for the regulating member is not impaired.

  In the power storage device according to one embodiment of the present invention, the conductive member includes a first connection plate of a first power storage element among the plurality of power storage elements, and a second power storage element adjacent to the first power storage element. The bus bar may be connected to the first connection plate.

  According to this configuration, when the bus bar is fastened to the first connection plate of the energy storage device, the first connection plate and the rotation of the first terminal connected to the first connection plate are restricted. The first connecting plate can be firmly fastened.

  The regulating member according to one embodiment of the present invention is a regulating member disposed in a power storage device including a plurality of power storage elements, each of the plurality of power storage elements including a container that houses an electrode body, and the electrode An electrode terminal electrically connected to a body; a connection plate connected to the electrode terminal; and a fastening member that fastens the connection plate and a conductive member outside the power storage element, and the restriction member Is at least partially disposed between the container and the connection plate of each of the plurality of power storage elements, and restricts movement of the plurality of fastening members in a direction intersecting the protruding direction of the electrode terminals. .

  According to the restriction member of this aspect, the same effects as those of the restriction member in the power storage device according to each of the aspects described above, such as suppression of rotation of the connection plate, can be obtained.

  According to the present invention, there is provided a power storage device including a plurality of power storage elements, wherein each power storage element can suppress an unnecessary shift of a member such as an electrode terminal and can be efficiently manufactured. can do.

It is a perspective view which shows the structure outline | summary of the electrical storage apparatus in embodiment. It is a perspective view which shows the outline | summary of the control member in embodiment. It is a top view which shows the outline | summary of the control member in embodiment. It is a perspective view which shows an example of the attachment method of the limitation member in embodiment. It is sectional drawing which shows the AA cross section in the control member of FIG. It is a figure which shows the part by which the control member of the battery in embodiment is arrange | positioned. It is a figure for demonstrating the anti-rotation effect about the connection board and electrode terminal by a control member. It is a perspective view which shows the control member in the modification 1 of embodiment. It is a perspective view which shows an external appearance in case the control member shown in FIG. 8 has a thin part. It is sectional drawing of the control member in the modification 2 of embodiment. It is a side view which shows the control member attached to the battery in the modification 3 of embodiment, and the side surface of the periphery. It is a perspective view which shows the battery and the limitation member in the modification 4 of embodiment. It is a top view which shows the control member in the modification 5 of embodiment. It is a perspective view which shows the control member in the modification 6 of embodiment. It is a schematic diagram which shows the structural example of the control member in embodiment.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  In addition, the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  In the following embodiments, a battery is taken as an example of a power storage element, and a battery in the embodiment and a power storage device including a plurality of the batteries are described with reference to FIGS.

(Outline of configuration of power storage device and battery)
FIG. 1 is a perspective view showing a configuration outline of a power storage device 1 according to the embodiment. In FIG. 1, the foremost battery 10 is a perspective view of the inside of the container 100 so that the outline of the internal structure is shown.

  The power storage device 1 according to the present embodiment includes a plurality of batteries 10 and a regulating member 220 attached to the plurality of batteries 10.

  The power storage device 1 includes a plurality of bus bars, and the plurality of batteries 10 are connected in series by a plurality of bus bars, but the bus bars are not shown in FIG. The arrangement position of the bus bars will be described later with reference to FIG.

  The power storage device 1 also includes other components not shown in FIG. 1, such as an exterior body that houses a plurality of batteries 10. However, in order to clearly describe the characteristics of the power storage device 1 of the present embodiment, the illustration and detailed description of other components such as the outer package are omitted.

  Since the power storage device 1 includes a plurality of power storage elements, the power storage device 1 may be called, for example, a “power storage module” or “assembled battery”. Moreover, each battery 10 may be called a "cell" or a "unit cell", for example.

  The battery 10 is a secondary battery that can charge and discharge electricity, for example, a non-aqueous electrolyte secondary battery.

  Examples of the non-aqueous electrolyte secondary battery include a lithium ion secondary battery in which the positive electrode active material is a lithium transition metal oxide such as lithium cobaltate and the negative electrode active material is a carbon material.

  The type of the battery 10 is not limited to the nonaqueous electrolyte secondary battery, and may be a secondary battery other than the nonaqueous electrolyte secondary battery, or may be a primary battery. Moreover, the battery 10 may be a capacitor such as a lithium ion capacitor, which is a power storage element.

  As shown in FIG. 1, the battery 10 includes a container 100 that houses the electrode body 400, and electrode terminals that are electrically connected to the electrode body 400 and project from the container 100. Specifically, the container 100 is provided with a positive electrode terminal 200 and a negative electrode terminal 300, each of which is an electrode terminal.

  One of the positive terminal 200 and the negative terminal 300 is an example of a first terminal, and the other is an example of a second terminal.

  The battery 10 further includes a connection plate 210 connected to each of the positive electrode terminal 200 and the negative electrode terminal 300. An external conductive member (in this embodiment, a bus bar) is fastened to each connection plate 210 by a fastening member 280.

  The fastening member 280 is realized by a combination of a bolt and a nut in the present embodiment. One of the two fastening members 280 arranged for one battery 10 is an example of a first fastening member, and the other fastening member 280 is an example of a second fastening member.

  The positive electrode terminal 200 and the connection plate 210 are connected by caulking or welding, for example. Similarly, the negative terminal 300 and the connection plate 210 are connected by caulking or welding, for example.

  In the battery 10 having such a configuration, a regulating member 220 that functions as a rotation stopper for the electrode terminal and the connection plate 210 is disposed. Specifically, in the present embodiment, when a plurality of batteries are arranged in a line as shown in FIG. 1, the regulating member 220 is disposed at each of the positions corresponding to both poles of each battery 10.

  At least a part of the regulating member 220 is disposed between the container 100 and the connection plate 210 of each of the plurality of batteries 10, and the electrode terminals (the positive terminal 200 or the negative terminal 300, the same applies hereinafter) of the plurality of fastening members 280. Restricts movement in a direction that intersects the protruding direction.

  In the present embodiment, the regulating member 220 regulates the movement of the plurality of fastening members 280 by holding a part of the plurality of fastening members 280, and the positive terminal 200 and the negative terminal 300. When the projecting direction is parallel to the Z-axis, the restricting member 220 restricts the movement of the fastening member 280 in the XY plane that is a plane intersecting the projecting direction.

  Further, in the present embodiment, the restricting member 220 is an engaging portion 221 including a portion provided in a cutout shape from the end edge of the restricting member 220, and other than the wall surface of the container 100 of at least one battery 10. It has an engaging part 221 that engages with the part. Details of the regulating member 220 will be described later with reference to FIG.

  The container 100 includes a container main body 101 having a rectangular cylindrical shape made of metal and having a bottom, and a metal lid plate 110 that closes an opening of the container main body 101.

  In addition, an electrode body 400, a positive electrode current collector 120, and a negative electrode current collector 130 are disposed inside the container 100.

  In addition, although liquid, such as electrolyte solution, is enclosed inside the container 100 of the battery 10, illustration of the liquid is omitted.

  The container 100 has a structure in which after the electrode body 400 and the like are accommodated therein, the lid plate 110 and the container body 101 are welded to seal the inside. As a technique for welding the lid plate 110 and the container body 101, for example, laser welding using a laser beam is employed.

  The electrode body 400 includes a positive electrode, a negative electrode, and a separator, and is a member that can store electricity. Specifically, the electrode body 400 is formed by winding a layered structure so that a separator is sandwiched between a negative electrode and a positive electrode so that the whole becomes an oval shape. Further, the positive foil is made of, for example, aluminum, and the negative foil is made of, for example, copper.

  The shape of the electrode body 400 is not limited to an oval shape, and may be a circular shape or an elliptical shape. The structure of the electrode body 400 is not limited to a wound type, and may be a structure in which flat plate plates are stacked.

  The positive electrode terminal 200 is an electrode terminal electrically connected to the positive electrode of the electrode body 400, and the negative electrode terminal 300 is an electrode terminal electrically connected to the negative electrode of the electrode body 400.

  The positive electrode terminal 200 and the negative electrode terminal 300 are attached to the cover plate 110 disposed above the electrode body 400 in a state insulated from the cover plate 110.

  Specifically, each of the positive electrode terminal 200 and the negative electrode terminal 300 is attached to the lid plate 110 via an insulating packing (not shown).

  The positive electrode current collector 120 is disposed between the positive electrode of the electrode body 400 and the side wall of the container 100, and is a member having conductivity and rigidity that is electrically connected to the positive electrode terminal 200 and the positive electrode of the electrode body 400. It is. The positive electrode current collector 120 is made of aluminum, like the positive electrode foil of the electrode body 400.

  The negative electrode current collector 130 is disposed between the negative electrode of the electrode body 400 and the side wall of the container 100, and is a member having conductivity and rigidity that is electrically connected to the negative electrode terminal 300 and the negative electrode of the electrode body 400. It is. The negative electrode current collector 130 is made of copper, like the negative electrode foil of the electrode body 400.

  Various non-aqueous electrolytes (electrolytic solutions) sealed in the container 100 can be selected.

  For example, as an organic solvent for non-aqueous electrolyte, ethylene carbonate, propylene carbonate, butylene carbonate, trifluoropropylene carbonate, γ-butyrolactone, γ-valerolactone, sulfolane, 1,2-dimethoxyethane, 1,2-diethoxyethane, Tetrahydrofuran, 2-methyltetrahydrofuran, 2-methyl-1,3-dioxolane, dioxolane, fluoroethyl methyl ether, ethylene glycol diacetate, propylene glycol diacetate, ethylene glycol dipropionate, propylene glycol dipropionate, methyl acetate, acetic acid Ethyl, propyl acetate, butyl acetate, methyl propionate, ethyl propionate, propyl propionate, dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, dipropyl carbonate, methyl isopropyl carbonate, ethyl isopropyl carbonate, diisopropyl carbonate, dibutyl carbonate, acetonitrile, fluoroacetonitrile, ethoxypentafluorocyclotriphosphazene, diethoxytetrafluorocyclotriphosphazene, Alkoxy and halogen-substituted cyclic phosphazenes such as phenoxypentafluorocyclotriphosphazene or chain phosphazenes, phosphate esters such as triethyl phosphate, trimethyl phosphate and trioctyl phosphate, boric acids such as triethyl borate and tributyl borate Esters, N-methyloxazolidinone, N-ethyloxazolidinone It includes non-aqueous solvents are. Moreover, a well-known additive can also be added to this.

  When a solid electrolyte is used, a porous polymer solid electrolyte membrane may be used as the polymer solid electrolyte, and an electrolyte solution may be further contained in the polymer solid electrolyte. Moreover, when using a gel-like polymer solid electrolyte, the electrolyte solution which comprises gel and the electrolyte solution contained in the pore etc. may differ. However, in the case of a medium-sized or large-sized battery that requires high output and high capacity, it is more preferable to use a nonaqueous electrolyte alone than to use a solid electrolyte or a polymer solid electrolyte.

(Details of restriction members)
The shape and the like of the regulating member 220 in the power storage device 1 according to the embodiment having the basic configuration as described above will be described with reference to FIGS.

  Here, in the present embodiment, the shape or the like of the left regulating member 220 in FIG. 1 is substantially the same as the shape or the like of the right regulating member 220 in FIG. Therefore, in the following, matters relating to the left regulating member 220 in FIG. 1 will be mainly described, and explanations of matters relating to the right regulating member 220 in FIG. 1 will be omitted as appropriate.

  FIG. 2 is a perspective view showing an outline of the regulating member 220 in the embodiment, and FIG. 3 is a top view showing an outline of the regulating member 220 in the embodiment.

  FIG. 4 is a perspective view showing an example of how to attach the regulating member 220 in the embodiment. In FIG. 4, the container 100 is indicated by a dotted line, and the inside of the container 100 is seen through.

  FIG. 5 is a cross-sectional view showing an AA cross section of the regulating member 220 of FIG.

  FIG. 6 is a diagram illustrating a portion where the regulating member 220 of the battery 10 according to the embodiment is disposed.

  6A is a top view showing the structure around the regulating member 220 in the battery 10, and FIG. 6B is a front view corresponding to FIG. 6A. 6 (c) is a side view corresponding to FIG. 6 (a).

  In the present embodiment, for convenience of explanation, the electrode terminal protruding direction (Z-axis positive direction) in the battery 10 is treated as the upper direction, but the direction of the battery 10 when the power storage device 1 is arranged in an automobile or the like. There is no particular limitation.

  The restricting member 220 of the present embodiment has a holding part 222. In the present embodiment, power storage device 1 has, for example, six batteries 10, and as shown in FIG. 2, regulation member 220 has six holding portions 222 corresponding to the number of batteries 10. . Note that the number of batteries 10 included in the power storage device 1 may be two or more.

  Further, in the power storage device 1, as shown in FIG. 3, a plurality of batteries are arranged such that the positive electrode terminals 200 and the negative electrode terminals 300 are alternately arranged at one end of both end portions in the width direction (X-axis direction) of the battery 10. 10 are arranged.

  That is, in the present embodiment, as shown in FIG. 3, there are three sets of the positive electrode terminal 200 and the negative electrode terminal 300 adjacent to each other at the end in the width direction of the battery 10. Terminal 300 is electrically connected by a conductive member (bus bar 800, see FIG. 4).

  For example, the connection plate 210 connected to the positive terminal 200 of the leftmost battery 10 in FIG. 3 and the connection plate 210 connected to the negative terminal 300 of the second battery 10 from the left are electrically connected by the bus bar 800. Is done. Note that one of the leftmost battery 10 and the second battery 10 from the left in FIG. 3 is an example of a first power storage element, and the other is an example of a second power storage element.

  In power storage device 1 having such a configuration, restriction member 220 holds a part of fastening member 280 that fastens each of a plurality of connection plates 210 and one bus bar 800 to be connected to connection plate 210. To do.

  Specifically, the holding part 222 holds a nut 282 that is a part of a fastening member 280 including a bolt 281 and a nut 282, as shown in FIGS.

  The holding part 222 of the present embodiment is realized by a hexagonal hole matched with a nut 282 whose outer shape is a hexagon. More specifically, the hole that is the holding portion 222 is a bottomed hole as shown in FIG.

  In the present embodiment, the restricting member 220 is made of an insulating material such as a resin. That is, the regulating member 220 has an insulating property that electrically insulates the container 100 and the fastening member 280 of each of the plurality of batteries 10. Therefore, even if there is no other insulating member between the regulating member 220 and the cover plate 110 immediately below the nut 282, the nut 282 and the cover plate 110 are electrically insulated. A specific example of the material of the regulating member 220 will be described later with reference to FIG.

  In FIG. 5, since the depth of the holding portion 222 is shallower than the axial height of the nut 282, a part of the nut 282 protrudes upward from the hole. However, the entire nut 282 may be inserted into the holding portion 222.

  In order to prevent the nut 282 inserted into the holding part 222 from falling off, the nut 282 and the holding part 222 (a part of the inner surface of the hole) may be temporarily fixed using, for example, a viscous material.

  Further, the nut 282 may be prevented from falling off by the frictional force between the regulating member 220 and the nut 282, which is generated by forming the hole serving as the holding portion 222 into a size that fits the nut 282.

  Further, the regulating member 220 in which a plurality of nuts 282 are embedded may be manufactured by insert molding.

  In this manner, the nut 282 is held by the restriction member 220 in a state where at least a part of the nut 282 is inserted into the holding portion 222 that is a hexagonal hole provided in the restriction member 220.

  Thereby, in each battery 10, rotation (rotation in the XY plane) of the nut 282 with respect to the restriction member 220 is restricted. That is, in each battery 10, the nut 282 is held by the holding unit 222, and thus the screwing between the bolt 281 and the nut 282 is facilitated.

  As shown in FIG. 4, the bus bar 800 is configured such that the bolt 281 that passes through the mounting hole 801 and the through hole 211 of the connection plate 210 and the nut 282 that is held by the holding portion 222 are screwed together. 210 is structurally and electrically connected.

  Further, as described above, the restricting member 220 includes the engaging portion 221 including a portion provided in a cutout shape from the end edge of the restricting member 220.

  In the present embodiment, the restricting member 220 is provided with six engaging portions 221 similar to the number of the batteries 10. As shown in FIGS. 2 to 4 and FIG. 6A, each engaging portion 221 has a hole (this embodiment) provided so as to sandwich the electrode terminal from the edge of the regulating member 220 from the radial direction. In this embodiment, a groove reaching a rectangular hole) is provided.

  That is, as shown in FIG. 4, the electrode terminal is inserted into the engaging portion 221 from the side of the electrode terminal attached to the lid plate 110 of the container 100 (the positive terminal 200 in FIG. 4, hereinafter the same). Thus, the restricting member 220 can be arranged.

  That is, when the regulating member 220 is arranged in the plurality of batteries 10, the regulating member 220 may be arranged so that the electrode terminal is inserted into each engaging portion 221 from the side of the electrode terminal of each battery 10. it can.

  Moreover, as shown in FIG. 3, a part of groove | channel in the engaging part 221 is narrower than the outer diameter of an electrode terminal. Thereby, the regulating member 220 can be engaged with the electrode terminal. Further, the regulating member 220 engaged with the electrode terminal does not easily fall off from the electrode terminal.

  The engaging portion 221 only needs to be provided corresponding to at least one battery 10. In other words, the restriction member 220 includes the engaging portion 221 that engages with the electrode terminal of at least one battery 10, so that the restriction member 220 can be retrofitted and fixed to the plurality of batteries 10.

  Moreover, the electrode terminal (positive electrode terminal 200 or negative electrode terminal 300) in this Embodiment is an example of parts other than the wall surface of a container of an electrical storage element.

  As described above, the regulating member 220 can be disposed later on the container 100 in a state where the lid plate 110 is welded to the container main body 101, that is, the battery 10 that has completed all assembly operations. In addition, even when a plurality of the batteries 10 are arranged, they can be arranged later.

  Here, since the restricting member 220 has the engaging portion 221 that engages with the electrode terminal, movement in the XY plane is restricted at least at one place. Further, the regulating member 220 has a holding portion 222 that holds the nut 282.

  Therefore, the movement of the nut 282 held by the restriction member 220 in the XY plane is restricted. As a result, as shown in FIG. 4, when the bus bar 800 and the connection plate 210 are fastened by the fastening member 280 (the bolt 281 and the nut 282), the connection terminals 210 and the electrode terminals connected to the connection plate 210 are rotated. Movement is regulated.

  In other words, the restricting member 220 exerts an anti-rotation effect on the connection plate 210 and the electrode terminal in each battery 10.

  Further, as described above, for example, resin is used as the base material, and the elastic deformation to the extent that the restriction member 220 can be attached to the container 100 is possible.

  Here, in the present embodiment, the regulating member 220 further includes a contact portion 223. The abutting portion 223 abuts against the wall surface of the container 100 of at least one battery 10, thereby restricting the rotation of the regulating member 220 in a plane (XY plane) intersecting the protruding direction of the electrode terminal.

  As shown in FIGS. 2 to 6, the contact portion 223 is provided in the restriction member 220 as a portion protruding downward from the lower surface edge of the restriction member 220.

  Therefore, the contact part 223 contacts the side wall surface 100a (see FIG. 6B) of the container 100 of the outermost battery 10 among the plurality of batteries 10 from the outside. Thereby, the rotation of the restricting member 220 in the XY plane is restricted.

  In addition, the side wall surface 100a is a wall surface parallel to the direction which cross | intersects the main surface 110a which is a surface where the electrode terminal of the container 100 is arrange | positioned.

  As described above, the regulating member 220 according to the present embodiment includes the abutting portion 223 that abuts against the wall surface of the container 100 of at least one battery 10. Thereby, rotation of the regulating member 220 is more reliably suppressed. As a result, the anti-rotation effect for the connection plate 210 and the electrode terminal in each battery 10 is also improved.

  FIG. 7 is a view for explaining the anti-rotation effect on the connection plate 210 and the electrode terminal by the restricting member 220.

  For example, when the head of a certain bolt 281 is rotated clockwise, for example, the rotation axis of the bolt 281 causes an external force to move the bolt 281 in a direction parallel to the XY plane. . As a result, the external force also acts on the nut 282 screwed with the bolt 281.

  However, as shown in FIGS. 2 to 4, the nut 282 is held by the restriction member 220, and the movement of the restriction member 220 with respect to the container 100 is restricted at least at one place. Therefore, the movement of the nut 282 is restricted.

  Furthermore, in the present embodiment, the regulating member 220 has a contact portion 223 that contacts the wall surface of the container 100 of at least one battery 10. Specifically, a plurality of batteries 10 arranged in a row are sandwiched between the restriction members 220 from both sides in a top view (when the plurality of batteries 10 are viewed from the side where the bus bar 800 is disposed, the same applies hereinafter). A pair of contact portions 223 are provided.

  As a result, the degree of freedom of movement of the restricting member 220 in the XY plane is suppressed as compared with the case where the pair of contact portions 223 is not provided.

  Here, when paying attention to one fastening member 280, a part of the fastening member 280 is held by one holding portion 222 of the regulating member 220. Therefore, the fastening member 280 also functions as a member that restricts movement of the restricting member 220 in the XY plane.

  Therefore, even when the regulating member 220 does not include the engaging portion 221 and the contact portion 223, the regulating member 220 penetrates the connection plate 210 and is regulated by the one fastening member 280 partially held by the regulating member 220. It is possible to suppress the movement and rotation of the member 220 in the XY plane. A restricting member that does not include the engaging portion 221 and the contact portion 223 will be described later with reference to FIG. 14 as a fifth modified example of the embodiment.

  Thus, each fastening member 280 in the present embodiment also functions as a member that improves the anti-rotation effect of the connection member 210 and the electrode terminal in each battery 10 that the regulating member 220 has.

  In the present embodiment, the engaging portion 221 of the regulating member 220 is engaged with the cylindrical electrode terminal. However, for example, a concave portion or a convex portion is formed on the peripheral surface of the electrode terminal, and a part of the engaging portion 221 is caught by the concave portion or the convex portion, thereby substantially preventing the restriction member 220 from rotating in the XY plane. May be.

  Further, for example, an auxiliary member having a shape other than a perfect circle (for example, a polygon) in top view passing through the electrode terminal is fixed to the lid plate 110 so as to be sandwiched between the lid plate 110 and the connection plate 210, The auxiliary member may be engaged with an engaging portion 221 having a shape that fits with the auxiliary member. In this way, it is possible to substantially prevent the regulating member 220 from rotating in the XY plane.

  Moreover, when providing the contact part 223 in the control member 220, there is no limitation in the number in particular. That is, one or three or more contact portions 223 may be provided on the restriction member 220.

  Further, the size and shape of the contact portion 223 are not limited to the size and shape shown in FIG. For example, the overall shape of the contact portion 223 in the front view does not need to be a rectangle as shown in FIG. 4B, and may be, for example, a semicircle, or a combination of a curve and a curve The shape may be

  As described above, power storage device 1 according to the present embodiment includes a plurality of batteries 10, and further includes a regulation member 220 that functions as an electrode terminal and connection plate 210 in each battery 10.

  Thereby, in each battery 10, the reliability of the connection part of the connection board 210 and an electrode terminal resulting from fastening the connection board 210 and the bus bar 800 is reduced, or the electrode terminal and the container 100 (the cover plate 110). ) And the like are suppressed.

  In addition, since a part of the regulating member 220 is disposed between the container 100 and the connection plate 210 of each of the plurality of batteries 10, the displacement of the connection plate 210 and the like in the plurality of batteries 10 is collectively regulated. Can do.

  That is, it is not necessary to previously attach the regulating member 220 to the container 100 (cover plate 110) of each battery 10, and the regulating member 220 can be retrofitted to the plurality of batteries 10.

  Therefore, for example, in the manufacturing process of each battery 10, it is not necessary to include attachment of the regulating member 220 to the container 100 in a process including complicated work such as attachment of the electrode terminal to the cover plate 110. A plurality of batteries 10, each of which is a finished product, can be arranged, and the regulating member 220 can be retrofitted to the plurality of batteries 10 at once. Thereby, the efficiency concerning manufacture of a plurality of power storage devices 1 can be improved.

  Further, in each battery 10, when the container body 101 and the lid plate 110 are welded, the regulation member 220 does not exist on the main surface 110 a of the lid plate 110. It is possible to weld the edge to the entire circumference.

  In other words, the welded portion between the container main body 101 and the lid plate 110, that is, the edge of the lid plate 110 can be covered with the regulating member 220.

  As a result, for example, as shown in FIG. 6A, when the battery 10 is viewed from the side where the bus bar 800 is disposed, the restriction member 220 includes at least the bus bar 800 and the main surface 110 a of the container 100. It can arrange | position so that the area | region which overlaps may be covered. In the present embodiment, the restricting member 220 is made of an insulating material.

  Thereby, even if the battery 10 to which the bus bar 800 is connected is placed in an abnormal state in which the bus bar 800 or the battery 10 is deformed by a strong impact, the container 100 and the bus bar 800 Occurrence of short circuit between them is suppressed. The effect of the regulating member 220 can be exhibited for all of the plurality of batteries 10 included in the power storage device 1.

  The battery 10 may include a regulating member having a shape different from the shape of the regulating member 220 shown in FIG. Therefore, various modified examples related to the regulating member 220 in the embodiment will be described below with a focus on differences from the above embodiment.

(Modification 1)
FIG. 8 is a perspective view showing a regulating member 250 in Modification 1 of the embodiment.

  A part of the regulating member 250 shown in FIG. 8 is arranged between the container 100 of each of the plurality of batteries 10 and the connection plate 210 on the left side (hereinafter simply referred to as “left side”) in FIG. 8. Furthermore, the other part of the regulating member 250 is disposed between the container 100 of each of the plurality of batteries 10 and the connection plate 210 on the right side (hereinafter simply referred to as “right side”) in FIG. 8.

  In other words, the regulating member 250 has a function as a detent for the positive side member and the negative side member in each of the plurality of batteries 10.

  Specifically, as shown in FIG. 8, the regulating member 250 includes a plurality of holding units 253 arranged in a row so as to correspond to each of the plurality of batteries 10, and a plurality of holding units 254 arranged in a row. Have

  Each of the plurality of holding portions 253 holds a nut 282 that is a part of the fastening member 280 disposed on the left side, and each of the number of holding portions 254 includes a part of the fastening member 280 disposed on the right side. The nut 282 is held.

  The restricting member 250 further includes a plurality of engaging portions 251 that each engage with the left electrode terminals, and a plurality of engaging portions 252 that each engage with the right electrode terminals.

  By having such a configuration, the restriction member 250 of the present modification functions as a detent for both electrodes (the positive electrode terminal 200 and the negative electrode terminal 300) in each of the plurality of batteries 10.

  The holding portions 253 and 254 are realized by hexagonal bottomed holes that match the nut 282 whose outer shape is a hexagonal shape as in the holding portion 222 in the embodiment shown in FIGS. 4 and 5.

  Further, the regulating member 250 further includes contact portions 255 and 256 that contact the side wall surface 100a of the container 100 of the battery 10 on the foremost side in FIG. 8 from the outside.

  Although not shown in FIG. 8, for example, the contact portions 255 and 256 are also arranged on the lower surface edge of the regulating member 250 on the back side.

  Thus, the regulating member 250 in this modification has a structure in which two regulating members 220 in the above embodiment are connected.

  When attaching the regulating member 250 having such a structure to the plurality of batteries 10 arranged in a row, for example, first, the nuts 282 are respectively held by the plurality of holding portions 253 and 254 of the regulating member 250.

  Further, each of the engaging portions 251 is inserted between each connection plate 210 and each container 100, and each engaging portion 251 is engaged with the left electrode terminal of each battery 10. In this state, the regulating member 250 is bent so as to be convex upward, and each engaging portion 252 is engaged with the right electrode terminal of each battery 10.

  For example, the regulating member 250 can be retrofitted to the plurality of batteries 10 by such a procedure. Thereafter, the bus bar 800 is fastened to the two connection plates 210 adjacent to each other in the arrangement direction of the batteries 10 and having opposite polarities using the bolts 281. Such a fastening operation is performed for one or more connection plates 210 that need to be connected to a conductive member such as the bus bar 800.

  At the time of this fastening, the restriction member 250 restricts the movement of the fastening member 280 in the direction intersecting the protruding direction of the electrode terminal. As a result, the rotation of the connection plate 210 and the electrode terminal in each battery 10 is suppressed.

  Note that one of the engaging portion 251 and the engaging portion 252 may be provided corresponding to at least one battery 10. That is, the restriction member 250 includes the engaging portions 251 or 252 that engage with at least one electrode terminal of the battery 10, so that the restriction member 220 can be retrofitted and fixed to the plurality of batteries 10.

  Further, since the regulating member 250 includes at least one abutting portion (for example, the abutting portion 255 shown in FIG. 8), the rotation of the regulating member 250 is more reliably suppressed, and as a result, the connection plate 210 and the like. The anti-rotation effect on the is also improved.

  In addition, when retrofitting the regulating member 250 to the plurality of batteries 10, a procedure for bending the regulating member 250 occurs. Therefore, in order to facilitate this bending (bending), the regulating member 250 may have a thin portion.

  FIG. 9 is a perspective view showing an appearance when the regulating member 250 shown in FIG. 8 has a thin portion 258.

  As shown in FIG. 9, the thin member 258 is provided on the restriction member 250 at a position between the two electrodes (the positive electrode terminal 200 and the negative electrode terminal 300) when the restriction member 250 is attached to the plurality of batteries 10.

  Thereby, since the bending of the regulating member 250 is facilitated, the efficiency of the retrofitting operation for the plurality of batteries 10 of the regulating member 250 is improved.

(Modification 2)
In the above embodiment, the abutting portion 223 of the regulating member 220 abuts on the side wall surface 100a (see FIG. 6B) of the container 100 of at least one battery 10 from the outside.

  However, the abutting portion may be provided on the regulating member so as to abut against a wall surface other than the side wall surface 100a of the container. For example, the contact portion may be provided on the regulating member so as to contact the inner wall surface of the container 100 of at least one battery 10.

  FIG. 10 is a cross-sectional view of the regulating member 260 in the second modification of the embodiment. The cross section shown in FIG. 10 is a cross section at a position corresponding to the AA cross section in FIG.

  As shown in FIG. 10, for example, when the lid plate 110 has a concave shape, the container 100 has an inner wall surface 100 b that is a wall surface standing from the edge of the main surface 110 a.

  In this case, the side surface in the Y-axis direction of the regulating member 260 functions as the contact portion 223a. Specifically, the outer side surface (left end surface in FIG. 10) of the regulating member 260 functions as the contact portion 223a.

  Further, as shown in FIG. 10, on the back surface of the regulating member 260, a convex portion having a shape corresponding to the concave shape of the cover plate 110 is formed at a position corresponding to the plurality of cover plates 110. Side surfaces on both sides in the Y-axis direction are in contact with the inner wall surface 100 b of the lid plate 110. That is, the side surfaces on both sides in the Y-axis direction of the plurality of convex portions provided on the back surface of the regulating member 260 function as the contact portions 223a.

  In the restriction member 260 in this modification, the rotation of the restriction member 260 in the plane intersecting the protruding direction of the electrode terminal is restricted by at least one contact portion 223a coming into contact with the inner wall surface 100b from the inside. . As a result, the anti-rotation effect of the connection plate 210 and the electrode terminal in each battery 10 is improved.

  The regulating member 260 may further include at least one abutting portion 223. Thereby, the anti-rotation effect about the connection board 210 etc. in each battery 10 by the control member 260 can further be improved.

(Modification 3)
In the above embodiment, when attention is paid to one battery 10, the fastening member 280 is arranged inside the electrode terminal in the battery 10 (see, for example, FIG. 1). However, the regulating member 220 can be retrofitted to a battery having a structure in which the fastening member 280 is disposed outside the electrode terminal.

  FIG. 11 is a side view showing the regulating member 220 attached to the battery 11 and its peripheral side surface in Modification 3 of the embodiment.

  In the battery 11 shown in FIG. 11, a connection plate 210 extending outward (left side in FIG. 11) is connected to the upper end portion of the positive electrode terminal 200, and a fastening member 280 is disposed outside the positive electrode terminal 200. The

  As described above, even in the structure in which the fastening member 280 is disposed outside the electrode terminal, a part of the regulating member 220 holding the nut 282 is connected to the connection plate 210 and the container 100 from the outside of the battery 11. It is possible to insert in between.

  That is, a restriction member 220 (see, for example, FIG. 2) having a plurality of holding portions 222 can be retrofitted to the plurality of batteries 11 arranged in a row, whereby the connection plate 210 in each battery 11 and An anti-rotation effect for the electrode terminal is exhibited.

(Modification 4)
In the above embodiment, the restriction member 220 holds the nut 282 that is a part of the fastening member 280. However, the regulating member 220 may hold the bolt 281 that is a part of the fastening member 280.

  FIG. 12 is a perspective view showing the battery 12 and the regulating member 220 in Modification 4 of the embodiment.

  In FIG. 12, the container 100 is indicated by a dotted line, and the inside of the container 100 is seen through.

  The battery 12 shown in FIG. 12 includes a connection plate 210a having a groove 212 as a characteristic configuration. The restricting member 220 holds the bolt 281 in an upright state.

  Specifically, the head of the bolt 281 is inserted into the holding portion 222 of the restriction member 220, and the bolt 281 is held by the restriction member 220 in this state.

  Further, the connection plate 210a is formed with a groove 212 extending from the end edge of the connection plate 210a to a position where the bolt 281 penetrates. Therefore, the regulating member 220 that holds the bolt 281 in an upright state can be inserted between the connection plate 210 a and the container 100.

  That is, it is possible to attach the regulating member 220 to the container 100 by inserting the bolt 281 into the groove 212 from the opening of the groove 212 present at the right end of the connection plate 210a in FIG.

  That is, the regulating member 220 that holds the plurality of bolts 281 in an upright state can be retrofitted to the plurality of batteries 12 arranged in a row.

  After the regulating member 220 is attached to the container 100 in this way, the bus bar 800 is disposed so that the bolt 281 penetrates the attachment hole 801 of the bus bar 800, and the bus bar 800 and the connection plate 210a are fastened by the nut 282. . Such a fastening operation is performed on one or more connection plates 210a that need to be connected to a conductive member such as the bus bar 800.

  At the time of this fastening, as explained in the above-described embodiment and the like, the restriction member 220 restricts the movement of each fastening member 280 in the direction intersecting the protruding direction of the positive electrode terminal 200. As a result, the rotation of the connection plate 210 and the electrode terminal in each battery 12 is suppressed.

(Modification 5)
FIG. 13 is a top view showing the regulating member 270 in the fifth modification of the embodiment.

  The restriction member 270 illustrated in FIG. 13 includes a plurality of holding portions 272 and a plurality of engagement portions 271, similarly to the restriction member 220 in the embodiment. Each of the holding portions 272 holds a nut 282 that is a part of the fastening member 280. The engaging portion 271 includes a portion provided in a cutout shape from the end edge of the regulating member 270 and engages with a portion other than the wall surface of the container 100 of at least one battery 10.

  That is, like the regulating member 220 in the embodiment, the regulating member 270 can be retrofitted to the plurality of batteries 10 arranged in a row, and functions as a detent for the connection plate 210 and the electrode terminal in each battery 10. It is a member.

  As shown in FIG. 13, the regulating member 270 in the present modification further has a groove 275 provided in a cutout shape from the end edge of the regulating member 270. Specifically, a groove 275 is provided at a position between two adjacent batteries 10 in a state where the regulating member 270 is attached to the plurality of batteries 10.

  That is, the regulating member 270 has a groove 275 that communicates the space between the containers 100 of the two adjacent batteries 10 and the space above the regulating member 270. Thereby, the heat of the space between the two batteries 10 can be efficiently released upward.

  As described above, the restriction member 270 in the present modification is provided with the groove 275 in the portion between the two batteries 10 that has little influence on the function of the rotation prevention and insulation of the member such as the connection plate 210. Yes.

  Thereby, for example, heat generated in each battery 10 can be efficiently radiated. In addition, a material such as resin used for the restriction member 270 can be reduced and the weight of the restriction member 270 can be reduced as long as the strength required for the restriction member 270 is not impaired.

  Note that the effect of heat dissipation or the like can also be obtained by providing the regulating member 270 with one or more holes (holes penetrating the regulating member 270 in the thickness direction) instead of the grooves 275.

  For example, a plurality of holes may be provided in the portion between the two batteries 10 in the top view of the regulating member 270 along the X-axis direction. In addition, a mesh portion may be formed in a part of the regulating member 270 by providing a plurality of holes in the regulating member 270 within a range that does not impair the strength required for the regulating member 270.

(Modification 6)
FIG. 14 is a perspective view showing a restricting member 290 according to Modification 6 of the embodiment. In FIG. 14, each battery 10 is indicated by a dotted line, and the connection plate 210 is not shown.

  As shown in FIG. 14, the regulating member 290 in the modified example 6 has a plurality of holding portions 292, like the regulating member 220 in the embodiment, and each of the holding portions 292 includes a part of the fastening member 280. The nut 282 is held.

  However, unlike the regulating member 220 in the embodiment, the regulating member 290 does not include the engaging portion 221 and the contact portion 223. That is, the regulating member 290 has a shape in which a plurality of bottomed holes that function as the holding portions 292 are formed in the flat plate-like main body, and has a structure in which a part of any battery 10 is sandwiched or hooked. Not done.

  However, even the regulating member 290 having such a structure can serve as a detent for the connection plate 210 or the like in each battery 10.

  For example, when the regulating member 290 is arranged with respect to the plurality of batteries 10 arranged in a row, and one connecting plate 210 and the bus bar 800 are fastened by the fastening member 280 (including a case where the fastening is temporarily done). Suppose. In this case, since a part of the fastening member 280 is held by one holding portion 292 of the regulating member 290, it also functions as a member that regulates the movement of the regulating member 290 in the XY plane.

  That is, each of the plurality of fastening members 280 corresponding to one regulating member 290 functions as a member that regulates movement of the regulating member 290 in the XY plane. Therefore, the movement of the restriction member 290 in the XY plane is substantially restricted by holding the restriction member 290 with the at least one fastening member 280 penetrating the connection plate 210.

  Note that when the bus bar 800 and the connection plate 210 are initially fastened by the fastening member 280, for example, the regulating member 290 may be fastened by being fixed with a jig or an adhesive tape for temporary fastening.

  Further, even when the jig is not fixed, the regulating member 290 is temporarily fixed by bringing the side surface of the flat regulating member 290 into contact with a part of the plurality of batteries 10. Can be stably performed.

  For example, when the innermost nut 282 of the plurality of nuts 282 shown in FIG. 14 is first screwed into the bolt 281 (see, for example, FIG. 4), the nut 282 is screwed into the nut 282 in top view. A clockwise external force acts. As a result, the regulating member 290 receives an external force that attempts to rotate clockwise as viewed from above.

  In this case, if the left side surface 290a of the regulating member 290 in FIG. 14 is in contact with the electrode terminal of any one of the batteries 10, the clockwise rotation of the regulating member 290 is regulated. Is done.

  Further, for example, any one of the two side surfaces 290b of the regulating member 290 in the arrangement direction (Y-axis direction) of the batteries 10 is formed on the inner wall surface 100b of the concave cover plate 110 in the same manner as the contact portion 223a in Modification 2. Also in the case of contact, the rotation of the restricting member 290 is restricted.

  As described above, even the restriction member 290 having a relatively simple shape as shown in FIG. 14 can be retrofitted to the plurality of batteries 10 and functions as a detent member for the connection plate 210 and the like. be able to.

(Regulator material)
The restricting members such as the restricting member 220 in the embodiment described above and its modifications 1 to 6 are made of, for example, a composite material of resin and inorganic material. Thereby, the improvement of the intensity | strength as rotation prevention of members, such as an electrode terminal, and the improvement of the reliability of electrical insulation between the container 100 and other members are achieved.

  Hereinafter, examples of materials that can be adopted as a material by the regulating member such as the regulating member 220 will be described.

  FIG. 15 is a schematic diagram illustrating a configuration example of the regulating member 220 according to the embodiment.

  As shown in (a) of FIG. 15, the regulating member 220 may be configured by dispersing and including β that is a particulate inorganic material in α that is a resin.

  Further, as shown in FIG. 15B, the regulating member 220 may be configured by dispersing γ, which is a fibrous inorganic material, in α, which is a resin.

  In addition, resin employ | adopted as (alpha) is the heat resistant resin illustrated below, for example.

  That is, polyvinyl alcohol (PVA), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyimide, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyetherimide (PEI), polyphenylsulfone ( PPSU), polyamideimide (PAI), polyethersulfone (PES), polysulfone (PSF), polyacrylate (PAR), liquid crystal polyester (LCP), melamine resin (MF), phenol resin (PF), silicone resin (SI) ), Epoxy resin (EP), and the like are exemplified as the heat resistant resin employed as a part of the material of the regulating member 220.

  In addition, as a fluororesin that is a kind of heat-resistant resin, polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / ethylene copolymer (ETFE), tetrafluoro Examples thereof include ethylene / perfluoroalkyl vinyl ether copolymer (FEP) and polychlorotrifluoroethylene (PCTFE).

  Also, a non-heat resistant resin may be adopted as α. Examples of the non-heat resistant resin employed as α include polyethylene (PE), polypropylene (PP), polystyrene, ABS resin, polyvinyl chloride, polystyrene, methacrylic resin, celluloses, and rubbers.

  Further, as β, which is a particulate inorganic material, for example, particulate ceramic is employed. Ceramics adopted as β include oxide ceramics such as alumina, silica, titania, zirconia, magnesia, ceria, yttria, zinc oxide, and iron oxide, and nitriding such as silicon nitride, titanium nitride, and boron nitride Physical ceramics are exemplified.

  Other ceramics used as β include silicon carbide, calcium carbonate, aluminum sulfate, aluminum hydroxide, potassium titanate, talc, kaolin clay, kaolinite, halloysite, pyrophyllite, montmorillonite, sericite, mica. Amesite, bentonite, zeolite, calcium silicate, magnesium silicate, diatomaceous earth, silica sand and the like are exemplified.

  Examples of γ that is a fibrous inorganic material include glass fiber, rock wool, carbon fiber, and ceramic fiber.

  In the case where the regulating member 220 includes ceramic particles or fibers, it is assumed that the electrolyte of the battery 10 has leaked from the container 100. In this case, the acid content generated by hydrolysis of the electrolyte contained in the electrolyte is reduced. The effect of trapping by particles or fibers can be expected.

  In addition, for example, by employing a water-repellent resin as a resin constituting a part of the material of the regulating member 220, it is possible to suppress the occurrence of condensation on the surface of the regulating member 220.

  The illustrations and effects on the material of the regulating member 220 described above are also applied to the regulating members in the first to sixth modifications.

(Supplement of embodiment and modification)
As above, the power storage device according to one embodiment of the present invention has been described based on the embodiment and the modification thereof. However, the present invention is not limited to these embodiments and modifications thereof. As long as it does not deviate from the gist of the present invention, various modifications conceived by those skilled in the art may be applied to the present embodiment or its modifications, or a structure constructed by combining a plurality of constituent elements described above. Included within the scope of the invention.

  For example, a member having the same shape as the restriction member 220 in the embodiment and having low insulation or no insulation may be attached to the plurality of batteries 10 as the restriction member 220 in the same manner as the restriction member 220. . Thereby, the anti-rotation effect about members, such as the above-mentioned electrode terminal, can be acquired.

  In this case, if there is an insulator such as a resin between the regulating member and the container 100 of each battery 10, electrical insulation between the regulating member and each container 100 is ensured.

  Further, the restricting member 220 is, for example, a rib for improving strength, and a rib provided so as to protrude from a flat plate-like main body may be formed. For example, when the regulating member 220 is manufactured as a molded article made of a resin-based material, a rib can be easily provided as an integral part of the regulating member 220.

  Further, the regulating member 220 does not have to be flat as a whole, and may be realized as a member in which a part of the fastening member 280 corresponding to the holding part 222 is provided on the main body of the frame structure.

  The various supplementary matters regarding the restriction member 220 described above are also applied to each of the restriction members in the first to sixth modifications.

  The conductive member fastened to the connection plate 210 or 210a by the fastening member 280 may be other than the bus bar 800. For example, a terminal of an electric wire for connecting the power storage device 1 and a device such as a motor outside the power storage device 1 may be fastened to the connection plate 210 or 210a as a conductive member.

  In addition, for example, the battery 12 in Modification 4 shown in FIG. 12 may include the regulating member 270 shown in FIG. 13 or the regulating member 290 shown in FIG. 14 instead of the regulating member 220.

  Further, for example, the right side structure (not shown in FIG. 12) of the battery 12 in Modification 4 shown in FIG. 12 may be the same as the battery 10 in the embodiment shown in FIG. That is, in the power storage device 1, a structure in which the restriction member 220 on one side of the positive electrode terminal 200 and the negative electrode terminal 300 of the at least one battery 12 holds the bolt 281 and the restriction member 220 on the other side holds the nut 282. It may be adopted.

  The present invention provides a power storage device including a plurality of power storage elements, each of which can suppress an unnecessary shift of members such as electrode terminals and can be efficiently manufactured. Can do. Therefore, the power storage device according to the present invention is useful as a power storage device mounted in an automobile or the like.

DESCRIPTION OF SYMBOLS 1 Power storage device 10, 11, 12 Battery 100 Container 100a Side wall surface 100b Inner wall surface 101 Container main body 110 Cover plate 110a Main surface 120 Positive electrode current collector 130 Negative electrode current collector 200 Positive electrode terminal 210, 210a Connection plate 211 Through-hole 212 Groove 220 , 250, 260, 270, 290 Restriction member 221, 251, 252, 271 Engagement part 222, 253, 254, 272, 292 Holding part 223, 223 a, 255, 256 Contact part 258 Thin part 275 Groove 280 Fastening member 281 Bolt 282 Nut 290a, 290b Side surface 300 Negative terminal 400 Electrode body 800 Bus bar 801 Mounting hole

Claims (15)

A power storage device comprising a plurality of power storage elements,
Each of the plurality of power storage elements is
A container for housing the electrode body;
A first terminal which is an electrode terminal electrically connected to the electrode body and provided protruding from the container;
A first connection plate connected to the first terminal;
A first fastening member for fastening the first connection plate and a conductive member outside the power storage element;
The power storage device further includes
At least partially, the disposed straddling Oite said plurality of power storage elements between the plurality of power storage devices each of said container and said first connecting plate, a plurality of the first fastening member, said first A power storage device including a regulating member that regulates movement in a direction intersecting a protruding direction of one terminal. The restricting member is an engaging portion including a portion provided in a cutout shape from an edge of the restricting member, and is other than the wall surface of the container of at least one of the plurality of energy storage elements. The power storage device according to claim 1, further comprising an engaging portion that engages with the portion. The power storage device according to claim 2, wherein the engaging portion engages with the first terminal which is a portion of the at least one power storage element other than the wall surface of the container. The regulating member further rotates in a plane intersecting the protruding direction of the first terminal by contacting the wall surface of the container of at least one of the plurality of electricity accumulating elements. The power storage device according to any one of claims 1 to 3, further comprising a contact portion that regulates the pressure. The abutting portion abuts from the outside on a side wall surface that is a wall surface parallel to a main surface that is a surface on which the first terminal of the container of the at least one power storage element is disposed, The power storage device according to claim 4, wherein rotation of the restriction member in the plane is restricted. The abutting portion abuts from the inside on an inner wall surface, which is a wall surface standing from an edge of a main surface on which the first terminal of the container of the at least one power storage element is disposed. The power storage device according to claim 4, wherein rotation of the regulating member in the plane is regulated. Each of the plurality of power storage elements further includes:
A second terminal which is an electrode terminal having a polarity opposite to that of the first terminal;
A second connection plate connected to the second terminal;
A second fastening member for fastening the second connection plate and a conductive member outside the power storage element;
A part of the regulating member is disposed between the container and the second connection plate of each of the plurality of power storage elements, and intersects the protruding direction of the second terminal of the plurality of second fastening members. The power storage device according to claim 1 , wherein movement in a direction is restricted . The power storage device according to claim 7, wherein the restriction member includes a thin portion that facilitates bending of the restriction member at a position between the first terminal and the second terminal. The power storage device according to any one of claims 1 to 8, wherein the regulating member has an insulating property for electrically insulating the first fastening member and the container of each of the plurality of power storage elements. The power storage device according to claim 9, wherein the regulating member is made of a composite material of a resin and an inorganic material. The first fastening member includes a bolt and a nut,
The power storage device according to claim 1, wherein the regulating member holds the nut that is a part of the first fastening member. The first fastening member includes a bolt and a nut,
The regulating member holds the bolt that is a part of the first fastening member in an upright state,
The power storage device according to claim 1, wherein a groove extending from an edge of the first connection plate to a position through which the bolt penetrates is formed in the first connection plate. The restriction member is provided in a cutout shape from an edge of the restriction member at a position between two adjacent electricity storage elements when the plurality of electricity storage elements are viewed from the side where the conductive member is disposed. The electrical storage apparatus of any one of Claims 1-12 in which the hole penetrated in the thickness direction or the said control member in the thickness direction is formed. The conductive member is a bus bar that connects a first connection plate of a first power storage element of the plurality of power storage elements and a first connection plate of a second power storage element adjacent to the first power storage element. The power storage device according to any one of 1 to 13. A regulating member disposed in a power storage device including a plurality of power storage elements,
Each of the plurality of power storage elements includes a container for accommodating an electrode body, an electrode terminal electrically connected to the electrode body, a connection plate connected to the electrode terminal, the connection plate, and the power storage element. A fastening member for fastening an external conductive member,
The restricting member is at least partially, the disposed straddling Oite said plurality of power storage elements between a plurality of storage elements each of said container and said connecting plate, a plurality of the fastening member, wherein A regulating member that regulates movement of the electrode terminal in a direction intersecting the protruding direction.

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